Robtex

Up: 98.137.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 98.137.192.0/21
Down right: 98.137.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
98.137.192.6	A	gi-2-29.bas2-1-yst.ac4.yahoo.com
98.137.192.151	A	eth-17-3.bas1-1-flk.bf1.yahoo.com
98.137.192.166	A	lo0.usw1-1-lba.bf1.yahoo.com
98.137.192.167	A	lo0.usw2-1-lba.bf1.yahoo.com
98.137.192.168	A	usw1-1-lbb.bf1.yahoo.com
98.137.192.169	A	usw2-1-lbb.bf1.yahoo.com
98.137.200.2	PTR	unknown-98-137-200-x.yahoo.com
98.137.200.133	A	c1a.ah.vip.bf1.yahoo.com
98.137.200.136	A	ynews.zenfs.com
98.137.200.136	A	ue100uw100.aa.mobstor.a01.yahoodns.net
98.137.200.136	A	msearch.zenfs.com
98.137.200.205	A	beap1.cb.a01.yahoodns.net
98.137.200.205	A	beap2.cbs.vip.bf1.yahoo.com
98.137.200.223	A	p62.toolbar.bf1.yahoo.com
98.137.200.243	A	any-fp-bcn1.prod.fp.a01.yahoodns.net
98.137.200.243	A	bcn1.prod.fp.vip.bf1.yahoo.com
98.137.200.245	A	idxd09.ssbe.search.bf1.yahoo.com
98.137.200.255	A	any-yqlyts-lfb.a05.yahoodns.net
98.137.201.0	A+PTR	ooradmin.media.verticals.vip.bf1.yahoo.com
98.137.201.2	PTR	www72.flickr.bf1.yahoo.com
98.137.201.32	PTR	www102.flickr.bf1.yahoo.com
98.137.201.111	A	web.analytics.yahoo.com
98.137.201.111	A	cinch-ci.org
98.137.201.111	A	vid.mobile.yahoo.com
98.137.201.114	PTR	ws.cap.vip.bf1.yahoo.com
98.137.201.114	A	analyze.yahooapis.com
98.137.201.117	A	clipart.geo.vip.bf1.yahoo.com
98.137.201.160	PTR	unknown-98-137-201-x.yahoo.com
98.137.201.161	PTR	unknown-98-137-201-x.yahoo.com
98.137.201.162	A+PTR	auto-up-l3.flickr.vip.bf1.yahoo.com
98.137.201.165	A	fr.toolbar.yahoo.com
98.137.201.165	A	uk.toolbar.yahoo.com
98.137.201.165	A	it.config.toolbar.yahoo.com
98.137.201.218	A	mail1.store.vip.bf1.yahoo.com
98.137.201.219	A	html1.store.vip.bf1.yahoo.com
98.137.201.220	A	domdb1.store.vip.bf1.yahoo.com
98.137.201.221	A	edit.store.yahoo.com
98.137.201.224	PTR	s401.tt.search.bf1.yahoo.com
98.137.201.232	A	any-cache.internal.query.a06.yahoodns.net
98.137.201.232	A	cricket.yql.yahooapis.com
98.137.201.232	A	any-geo-cache-ds.internal.query.a03.yahoodns.net
98.137.201.246	A	fe2.intl.search.vip.bf1.yahoo.com
98.137.201.247	A	ciews.mct.vip.bf1.yahoo.com
98.137.201.251	A	thumbp28.mail.vip.bf1.yahoo.com
98.137.201.252	A	dictionary.search.yahoo.com
98.137.202.113	PTR	spbe18.search.bf1.yahoo.com
98.137.202.219	A	app2.yala.bf1.yahoo.com
98.137.202.245	A	search1.yala.bf1.yahoo.com
98.137.202.248	A	app1.stage.yala.vip.bf1.yahoo.com
98.137.202.254	A	fe101-vm09.qa.profile.bf1.yahoo.com
98.137.203.47	A	xa.int.images.search.yahoo.com
98.137.203.47	A	chfr.qa.video.search.yahoo.com
98.137.203.47	A	xa.int.video.search.yahoo.com
98.137.203.48	A+PTR	ws1.data.bf1.yahoo.com
98.137.203.70	A	any-fam.data.fy2.b.yahoo.com
98.137.203.70	A	bsav.search.yahoo.com
98.137.203.115	PTR	pprd1-node37.manhattan.bf1.yahoo.com
98.137.203.159	A	fe100-vm09.qa.profile.bf1.yahoo.com
98.137.203.175	A	twtrcrawler.userloc.bf1.yahoo.com
98.137.203.209	PTR	test54.p.ah.bf1.yahoo.com
98.137.203.229	A	bf1-lhdruid-005.data.bf1.yahoo.com
98.137.204.63	A	any-apple-weather-yql.media.a04.yahoodns.net
98.137.204.63	A	content-syndication-yql.a03.yahoodns.net
98.137.204.63	A	content-syndication-yql.media.yahoo.com
98.137.204.66	A+PTR	hpto-001.adx.bf1.yahoo.com
98.137.204.66	A	hpto.yahoo.com
98.137.204.81	PTR	api1.member.vip.bf1.yahoo.com
98.137.204.81	A	api.reg.yahoo.com
98.137.204.81	A	api.reg.lga1.b.yahoo.com
98.137.204.87	A	edit.member.lga1.b.yahoo.com
98.137.204.87	A	edit-global.lgg1.b.yahoo.com
98.137.204.98	PTR	editin2.member.vip.bf1.yahoo.com
98.137.204.98	A	any.edit.india.a1.b.yahoo.com
98.137.204.99	A	kr.edit.yahoo.com
98.137.204.103	A	us-weather.a05.yahoodns.net
98.137.204.103	A	weather.a05.yahoodns.net
98.137.204.240	A+PTR	gops.use105.mobstor.vip.bf1.yahoo.com
98.137.204.240	A	ds-ue105uw105.aa.mobstor.a01.yahoodns.net
98.137.204.240	A	mobiledl.zenfs.com
98.137.205.0	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.2	PTR	pushgw34.snp.mobile.bf1.yahoo.com
98.137.205.15	A	gs.fp.wa1.b.yahoo.com
98.137.205.17	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.18	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.19	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.69	A	gi-4-4.bas1-1-yst.ac4.yahoo.com
98.137.205.194	A	ha2.gi-4-2.bas-1-yst.ac4.yahoo.com
98.137.205.232	A	fe-a-l3.profile.vip.bf1.yahoo.com
98.137.205.232	A	profile.yahoo.com
98.137.205.233	A	any-appleweather-cache.internal.query.a03.yahoodns.net
98.137.205.233	A	yts10.yql.vip.bf1.yahoo.com
98.137.205.245	A	ats.apple.yql.vip.bf1.yahoo.com
98.137.206.125	A	h187.hlfs.bf1.yahoo.com
98.137.206.162	A	holtworker112.flickr.bf1.yahoo.com
98.137.206.228	A	h131.hlfs.bf1.yahoo.com
98.137.207.4	A	4.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.5	A	5.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.6	A	6.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.10	A	ws176.socdir.bf1.yahoo.com
98.137.207.28	A	h234.hlfs.bf1.yahoo.com
98.137.207.33	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.36	A	h068.llfs.bf1.yahoo.com
98.137.207.45	A	h077.llfs.bf1.yahoo.com
98.137.207.47	A	h079.llfs.bf1.yahoo.com
98.137.207.60	A	1045653.ostk.bm2.prod.bf1.yahoo.com
98.137.207.60	A	ws178.socdir.bf1.yahoo.com
98.137.207.61	A	ws179.socdir.bf1.yahoo.com
98.137.207.61	A	1044993.ostk.bm2.prod.bf1.yahoo.com
98.137.207.73	A	h009.llfs.bf1.yahoo.com
98.137.207.76	A	76.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.78	A	h014.llfs.bf1.yahoo.com
98.137.207.83	A	h019.llfs.bf1.yahoo.com
98.137.207.97	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.97	A	h033.llfs.bf1.yahoo.com
98.137.207.105	A	h041.llfs.bf1.yahoo.com
98.137.207.112	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.118	A	h054.llfs.bf1.yahoo.com
98.137.207.132	A	h004.hlfs.bf1.yahoo.com
98.137.207.145	A	h017.hlfs.bf1.yahoo.com
98.137.207.147	A	h019.hlfs.bf1.yahoo.com
98.137.207.187	A	h059.hlfs.bf1.yahoo.com
98.137.207.195	A+PTR	h067.hlfs.bf1.yahoo.com
98.137.207.222	A	h094.hlfs.bf1.yahoo.com
98.137.207.230	A	h102.hlfs.bf1.yahoo.com
98.137.207.231	A	h103.hlfs.bf1.yahoo.com